Power transmission device of four wheel drive vehicle

Abstract

An output shaft is disposed in parallel relation to an engine crank shaft. The output shaft is formed with a gear portion. A first drive shaft is formed with another gear portion which is meshed with the gear portion formed on the output shaft, and disposed in the longitudinal direction intersecting the output shaft at right angle. The first shaft is adapted to transmit power to either ones of front and rear wheels. The output shaft and the first drive shaft are supported on a case. The case is detachably attached to an internal combustion engine. A second drive shaft is supported on an extension of the first drive shaft, and connected to the first drive shaft. The second drive shaft is adapted to transmit power to the remaining wheels of the front and the rear wheels. Due to the foregoing arrangement, both the front and rear wheels are simultaneously driven by one engine output shaft.

What is claimed is: 
     
       1. A power transmission device of a four wheel drive vehicle comprising: an engine having a case and a crank shaft in said case disposed perpendicular to the longitudinal direction of said vehicle;   an output shaft disposed in parallel relation to said engine crank shaft and projecting from a side of said engine case;   a first drive shaft including a gear portion meshed with a gear portion formed on said output shaft, disposed in the longitudinal direction of said vehicle and intersecting said output shaft at right angle for transmitting power to either ones of the front and the rear wheels;   a case supporting said output shaft and said first drive shaft, and detachably attached to an internal combustion engine; and   a second drive shaft outside of said case supporting said output shaft and said first drive shaft, said second drive shaft being supported on an extension of said first drive shaft and connected to said first drive shaft for transmitting power to the remaining wheels of the front and the rear wheels.   
     
     
       2. A power transmission device of a four wheel drive vehicle comprising: an engine having a case and a crank shaft in said case disposed perpendicular to the longitudinal direction of said vehicle;   an output shaft disposed in parallel relation to said engine crank shaft and projecting from a side of said engine case;   a first drive shaft including a gear portion meshed with a gear portion formed on said output shaft, disposed in the longitudinal direction of said vehicle and intersecting said output shaft at right angle for transmitting power to either ones of the front and the rear wheels;   a case supporting said output shaft and said first drive shaft, and detachably attached to an internal combustion engine; and   a second drive shaft outside of said case supporting said output shaft and said first drive shaft, said second drive shaft being supported on an extension of said first drive shaft and connected to said first drive shaft through a coupling for transmitting power to the remaining wheels of the front and the rear wheels, said coupling being detachably attached to said first drive shaft and said second drive shaft for rigidly connect both said drive shafts.